Brake.



' idly carry off the heat imparted HERBERT FROOD, OF BUXTON, ENGLAND.

BRAKE.

Speeeation of Letters Patent.

raten-rea Apr. 2o, i915.

Application filed July 25, 1913. Serial No. 781,067.

T0 all whom it may concern.'

Be it known that I, HERBERT Fnoon, a subject of the King of GreatBritain. and ireland, and a resident of Buxton, in the county of Derby,llngland,'have invented certain new and useful Improvements in Brakes,of which .the following is a specilication.

This invention relates to improvements in and in connection with brakesthe Wearing surfaces or elements of which are composed of textile orlike or other non-metallic material. Such -a wearing surface or elementmay conveniently be of the nature described in the specification tomyprior BritishLetters Patent No. 4627 of 1909. Brake bands vor blocksof the character and substance above referred to are commonly mountedupon shoes or supports which may be vmetallic or'non-nietallic.' Ineither case no provision has been made for immediately conducting awayor dissipating the heat set up in the band or block as a consequenceofthe application of the brake, with the result that the shoe, support,post, or the like bearing the band or the block, has become so hot thatthebraking surface has been damaged by it, and in some `cases, whereWood hasbeen used as a backing for the brake, the Wood has been set onlire.

In carrying this invention into effect the brake band or block ismounted upon or combined with a backing or support whichv is of such anature and conformation as to efficiently and readily conduct andradiate or dissipate the heatconveyed to it by the brake band or block.Such backing or support may itself form-the main support for the brakeblock or band, but it is vpreferably placed between such band or thelike and the post or equivalent member by which the band is carried. Ifthe heat dissipating backing is integral with the post or the like, thenecessary formation will be given to the post at or near that surface towhich the brake band or'block is applied.

The heat dissipating backing or like part of a Vpost or other support isof a construetion and disposition which Will permit and induce the freecirculation of atmospheric air through and around and about it to raptoit.

The accompanying drawings illustrate varions forms of heat dissipatingdevices combined with various brake blocks and supports thereforaccording to this invention.

Figure 1 illustrates in side elevation a post brake for colliery Winding'gear hav ing a heat dissipating backing for the brake block. Fig. 2illustrates in front vien7N the heat dissipating backing employed in thebrake of Fig. l. Fig. 3 illustrates in a similar View to Fig. l a likebrake -furnished with a modification of the heat dissipating device ofFigs. 1 andv2. Fi View of the post of Fig. 3, the brake block beingremoved from the post to permit the modified form of heat dissipatingdevice to be seen. Figs. 5, 6 and 7 illustrate further .odiications asapplied to a post brake. Fig. S shows still further modifications in apost brake.. Figs. 9 and 10 illustrate a form in which the heatdissipating device or part of it is integral with the support for thebrake block. Fig. 9 shows the various parts in side elevation assembledtogether;

g. 4 is a faceV Fig. 10 shows in like elevation the various partsseparated from each other.

Similar letters of reference indicate similar or equivalent parts wherethey occur in the different ligures.

Referring lrst to Figs. 1 and 2 A indicates the usual support whichsupports the brake block B; Thisbrake block is of the nonmetalliccharacter or nature hereinbefore described. -Between the support A andthe block B is interposed a strip C of open meshed woven thick Wirefabric. The edges and ends of this strip are exposed to the air, so thatthe channels or passages formed through and along the fabric by-` themeshing and intersections of its component Wires are open to the air.InV place of the strip of Woven Wire fabric of Figs. l and 2, lengths ofold wire rope may be employed. Such an arrangement is convenient .andeconomical for use in a colliery where such pieces of old rope aregenerally available. Figs. 3 and 4 show several lengths of Wire rope Claid in a recess formed `in that face of the support A to which thebrake block B is applied. The parallel disposition of thevarious'lengths of rope in the manner shown produces longitudinal airspaces or channels between the various lengths, and the convolutions ofthe stra-nds of the different len ths provide transverse air channelsleading into the longitudinal ones. The edges of the recess in thesupport are perforated as at D L' so as "tb give tmospbericoommunic'ejtion to oe otlie oorrugetedstrip of metoTC of the various airchannels in end betvleenbe Fig.y 8 and be ot snfxcient stiness topreropes. vent-#the substaneebl the block B being de- 4c In themodification of Figs. 5, 6 and 'a' s pressed into thevalleys of thecorrugated metal plate C having transverse ribs or EDS stri proieptinviront onesee, inter osedfoeY atleleimis1- l twenithe lo'ckB and thesupport When l. 'In e mechanical brake, e textilebreke" the plate is inplace its edges are .open to' the .block, s. "support therefor, 'endmete-lhs 45 air. Tl1`e"`plate may be closely perforated heat conductingbacking interposed betvveen 10 into' tlezspeees 'between the" transverseribs the two, said boeking being 'l ormed; withi as shown stE'i'n Figui'ln Figs. 5 end 6 air-passeges therein to eectively radiate the plate Cis shown formed for the epplithe heet taken up b'y the backing from'seid cation of the brake block to its smooth face' block, substantiallyas described. 50 and 4vvitb. ,its ribbed 'face for application to 2. Ine mechanical broke', e textile bke thesupport A.. This arrangement maybe block, e support therefor, and e metallic reversed, that is theribbed fece may beer backing interposed-between said bleek en' thebrkeblock end the smooth 'tace be apsupport having @plurality of beatradiatingplied to the:.-support.y With. this reversed surfaces andair-passages for conducting 55 -errongement the perorations E ere notneebeet away from the block and support.

essary. In Figs. 5, Gand 7 the grooves pro- 3. ln combination a textilebrake block "a' ducedby the ribs are shown es only extendsupporttherefor, having 'e ribbed niet'l llic ing transversely across the plateC. lf de heat radiating 'surface interposed' between sired, however,otherv grooves, for exemple the block and the main body of'seid support,l6o 'lon 'tudinel ones, may be formed on the face substantially es setforth. 'I g of t e plateinsteed of or in addition to tbe Ll. Incombination s textile brake block, s Y transverse grooves. Y groovedmetallicA shoe therefor and a thin They brake shown in Fig. 8 has itAtrensmetal plate interposed between the grooved verselyrorrgeted stripof metal C disposed metallic shoe and the block, substantially es 65 v"between the support and the block B. set forth.

In the form of brekeend lient dissipating ln witness whereof l havehereunto set g device shown inv Figs, 9 and l0 tbe face of my hand inthe presence oi. two subscribing 'the iietallio sloe orusupport A.trenos- Witnesses. verse y groove as i ustrated at n r' this groovedface is leid a thin sheet metal' HERBERT FRQE' plate C2 which may beclosely perforated. Witnesses:

The block Bis laid on the plete C2. 'WILLrAM Geo. Hers, A plate snob asC2 maybe laid on the JOHN OGONNELL.

